621148331439 has 48 divisors (see below), whose sum is σ = 987354950400. Its totient is φ = 389380913856.

The previous prime is 621148331413. The next prime is 621148331519. The reversal of 621148331439 is 934133841126.

621148331439 is a `hidden beast` number, since 6 + 21 + 1 + 483 + 3 + 143 + 9 = 666.

It is not a de Polignac number, because 621148331439 - 2⁸ = 621148331183 is a prime.

It is a super-4 number, since 4×621148331439⁴ (a number of 48 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 621148331394 and 621148331403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621148331539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 612094 + ... + 1271595.

It is an arithmetic number, because the mean of its divisors is an integer number (20569894800).

Almost surely, 2^621148331439 is an apocalyptic number.

621148331439 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

621148331439 is a deficient number, since it is larger than the sum of its proper divisors (366206618961).

621148331439 is a wasteful number, since it uses less digits than its factorization.

621148331439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1883786 (or 1883774 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The spelling of 621148331439 in words is "six hundred twenty-one billion, one hundred forty-eight million, three hundred thirty-one thousand, four hundred thirty-nine".